I've done a scan last week and I am currently 29 weeks pregnant. I was told that the baby's arms and femur are below 3rd centile. I did the amniocentesis on the same day and so far got the result for Down's Syndrome which was negative. I am now waiting for the second sets of result to find out any genetic abnormality. I am so scared, please, please let me know if anyone has had the same experience.